Heating device for motor stator

Abstract

The invention discloses a heating device for a motor stator, relates to the technical field of motor stator heating, and solves the problem that a stator winding is hard at normal temperature and difficult to disassemble when the motor stator is disassembled and maintained. A heating device for a motor stator comprises a machine table and the stator, a heat preservation device and an electromagnetic heating coil device are arranged at the upper end of the machine table, a mechanical claw is arranged between the heat preservation device and the electromagnetic heating coil device and located at the upper end of the machine table, and an air inlet plate is fixedly connected to one side of the inner wall of the heat preservation device. The side, close to the inner wall of the heat preservation device, of the air inlet plate is provided with a plurality of air inlet grooves in through connection, the top end of the heat preservation device is fixedly connected with an air pump and a heating box, and the two ends of the air pump are connected with the air inlet plate and the heating box through connecting pipes correspondingly. The stator is heated through the electromagnetic heating coil device, and then the stator is cooled and kept at a certain temperature through the heat preservation device.

Description

Technical Field

[0001] The present invention relates to the technical field of motor stator heating, and in particular to a heating device for a motor stator. Background Art

[0002] The primary purpose of heating the motor stator in an automobile is to facilitate thermal assembly of the motor's aluminum housing with components such as the stator and rotor. High-frequency heating equipment utilizes the principle of electromagnetic induction to heat the motor's aluminum housing, generating eddy currents within the housing that are converted into heat energy. This raises the housing's temperature to a predetermined range, ensuring perfect fit with the stator, rotor, and other components. The stator is the stationary part of an electric motor or generator, primarily consisting of the stator core, stator windings, and frame. Its primary function is to generate an air gap magnetic field, driving the rotor to rotate, thereby generating power or electrical energy.

[0003] When the motor stator is disassembled for maintenance, it is difficult to disassemble because the stator winding is very hard at room temperature, and forced disassembly may cause damage to the stator; therefore, it does not meet the existing needs. We have proposed a heating device for the motor stator. Summary of the Invention

[0004] The purpose of the present invention is to provide a heating device for a motor stator to solve the problem in the above background technology that the stator winding is very hard at room temperature during disassembly and maintenance, and forced disassembly may cause damage to the stator.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a heating device for a motor stator, comprising a machine table and a stator, the upper end of the machine table is provided with an insulation device and an electromagnetic heating coil device, a mechanical claw is provided between the insulation device and the electromagnetic heating coil device, and located at the upper end of the machine table, the bottom end of the interior of the insulation device is connected to a placement plate through a reduction motor, the upper end of the placement plate is connected to a clamping plate through a driving structure, the stator is provided at the upper end of the placement plate, and the outer wall of the clamping plate is in contact with the inner wall of the stator, one side of the inner wall of the insulation device is fixedly connected to an air inlet plate, and a side of the air inlet plate close to the inner wall of the insulation device is provided with a plurality of through-connected air inlet slots, the top of the insulation device is fixedly connected to an air pump and a heating box, the two ends of the air pump are respectively connected to the air inlet plate and the heating box through connecting pipes, and an electric heating tube is fixedly installed inside the heating box.

[0006] Preferably, the driving structure includes a limit plate, a driven gear and a driving gear, the limit plate is rotatably connected to the upper end of the placement plate through a rotating shaft, and the bottom end of the rotating shaft extends through a coupling to the bottom end of the placement plate and is sleeved on the outer surface of the output end of the reduction motor.

[0007] Preferably, the driven gear is fixedly connected to the outer surface of the bottom end of the rotating shaft, the driving gear is rotatably connected to one side of the bottom end of the placement plate through the rotating shaft, and the outer surface of the driving gear is meshed with the outer surface of the driven gear, and the bottom end of the driving gear is fixedly connected to a turning handle.

[0008] Preferably, three groups of slide rails are fixedly connected below the limit plate and at the upper end of the placement plate, the upper ends of the three groups of slide rails are slidably connected to slide seats, and the splints are fixedly connected to the upper ends of the three groups of slide seats on a side away from each other.

[0009] Preferably, three groups of limiting holes are opened on the upper end surface of the limiting plate, and each group of limiting holes is arranged in an arc-shaped inclined shape. The upper ends of the three groups of sliding seats away from the splint are fixedly connected to the limiting rods, and the limiting rods are slidably connected to the corresponding limiting holes.

[0010] Preferably, a fixing seat is fixed at the bottom end of the placement plate and located on one side of the driving gear. A groove is provided on the side of the fixing seat close to the driving gear. A connecting rod is movably connected inside the groove and extends through the outside of the fixing seat.

[0011] Preferably, the outer surface of the connecting rod at one end inside the groove is fixedly connected to a slide, and the slide is slidably connected to the inside of the groove, a spring is fixedly connected between one side of the slide and the inner wall of the groove, and the spring is wrapped around the outer surface of the connecting rod.

[0012] Preferably, one end of the connecting rod close to the driving gear is fixedly connected to a limiting block, and one end of the limiting block movably extends through the outer surface of the fixing seat and engages with the outer surface of the driving gear.

[0013] Preferably, a feed transmission chain is provided at the upper end of the machine and located on the rear side of the electromagnetic heating coil device, a discharge transmission chain is provided at the upper end of the machine and located on the front side of the heat preservation device, an electric heating wire is provided inside the discharge transmission chain, the top of the heat preservation device and located on one side of the heating box are fixedly connected with a return box, an activated carbon filter plate is sealed and plugged into one side of the inside of the return box, an air outlet plate is fixedly installed on the side of the heat preservation device away from the air inlet plate, a plurality of through-connected air outlet slots are provided on the surface of the air outlet plate, the side of the return box away from the heating box is connected to the air outlet plate through a connecting pipe, and a one-way valve is provided at the vent of the air outlet plate.

[0014] Preferably, a first solenoid valve is connected to the side of the heating box close to the reflux box, and the reflux box is connected to the first solenoid valve through a connecting pipe, a second solenoid valve is connected to one end of the heating box, and a third solenoid valve is connected to one side of the upper end of the reflux box.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention sequentially conveys each stator to the rear side of the electromagnetic heating coil device through a feed transmission chain. Since the temperature of the electromagnetic heating coil device is relatively high, the stator is grabbed by a mechanical claw and placed inside the electromagnetic heating coil device for heating. The heated stator is then grabbed by a mechanical claw and placed on a placement plate inside the heat preservation device, and sleeved on the outer surface of the limit plate. The turning handle is then rotated to drive the driving gear to rotate. The driving gear engages and drives the driven gear to rotate at the same time, and the limit plate is driven to rotate through the connection of the rotating shaft between the limit plate and the driven gear. At this time, each limit rod is slidably connected to the inside of the corresponding limit hole, thereby pushing the three sets of slides to slide along the slide rail toward the side away from each other, and driving the splint to fit close to the inner wall of the stator, thereby fixing the stator inside the heat preservation device according to its size. 2. The present invention pulls the connecting rod, which drives the slide to compress the spring and drive the limit block to disengage from the driving gear. When the pulling on the connecting rod is released, the spring releases its elastic force, thereby pushing the limit block to engage with the outer surface of the driving gear, thereby limiting the rotation of the driving gear and preventing the movement of the driven gear from affecting the fixation of the stator. 3. After the stator is fixedly placed inside the heat preservation device, the present invention starts the electric heating pipe to heat the air inside the heating box, and uses an air pump in conjunction with a connecting pipe to send hot air to the air inlet plate, and then uses each air inlet slot to evenly and comprehensively transport the hot air to the inside of the heat preservation device, and at the same time starts the reduction motor to drive the placement plate provided with the stator to rotate, so that the stator is evenly heated inside the heat preservation device, thereby reducing the temperature of the stator in the electromagnetic heating coil device, which is convenient for subsequent processing operations, and then the stator is taken out from the inside of the heat preservation device and placed on the upper end of the discharging transmission chain for the next operation. The electric heating wire provided inside the discharging transmission chain can keep multiple stators transported simultaneously warm; 4. In the present invention, the air passes through the air outlet slot and is discharged from the vent of the air outlet plate, and a one-way valve is used to prevent air backflow. The air enters the reflux box through the connecting pipe and is purified by the activated carbon filter plate. The air passes through the connecting pipe to the first solenoid valve and enters the heating box, where the air is heated for the second time, thereby forming a cycle and improving energy-saving effects. After long-term use, the second solenoid valve and the third solenoid valve can be opened, and the first solenoid valve can be closed to allow fresh air to enter the heating box. At the same time, the air in the reflux box is discharged to achieve fresh air ventilation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 A front cross-sectional view of the present invention as a whole; Figure 3 A top view of the present invention as a whole; Figure 4 It is a partial structural schematic diagram of the heat preservation device of the present invention; Figure 5 It is a schematic diagram of the local structure of the driving structure of the present invention; Figure 6 A cross-sectional view of the bottom of the placement plate of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point A in the middle.

[0017] In the figure: 1, machine; 2, stator; 3, heat preservation device; 4, electromagnetic heating coil device; 5, placement plate; 6, heating box; 7, electric heating tube; 8, air pump; 9, driving structure; 901, limit plate; 90101, limit hole; 902, driven gear; 903, driving gear; 904, slide rail; 905, slide seat; 906, limit rod; 10, clamping plate; 11, fixed seat; 1101, groove; 1 2. Connecting rod; 13. Slide plate; 14. Spring; 15. Limit block; 16. Air inlet plate; 1601. Air inlet slot; 17. Air outlet plate; 1701. Air outlet slot; 18. Connecting pipe; 19. One-way valve; 20. Reflux box; 21. Activated carbon filter plate; 22. First solenoid valve; 23. Second solenoid valve; 24. Third solenoid valve; 25. Feed transmission chain; 26. Discharge transmission chain; 27. Mechanical claw. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] See also Figures 1 to 7 , the present invention provides an embodiment: a heating device for a motor stator, comprising a machine table 1 and a stator 2, a heat preservation device 3 and an electromagnetic heating coil device 4 are provided at the upper end of the machine table 1, a mechanical claw 27 is provided between the heat preservation device 3 and the electromagnetic heating coil device 4, and at the upper end of the machine table 1, the bottom end of the heat preservation device 3 is connected to a placement plate 5 through a reduction motor drive, the upper end of the placement plate 5 is connected to a clamping plate 10 through a driving structure 9, the stator 2 is arranged at the upper end of the placement plate 5, and the outer wall of the clamping plate 10 is in contact with the inner wall of the stator 2, one side of the inner wall of the heat preservation device 3 is fixedly connected to an air inlet plate 16, and a side of the air inlet plate 16 close to the inner wall of the heat preservation device 3 is provided with a plurality of through-connected air inlet slots 1601, the top of the heat preservation device 3 is fixedly connected to an air pump 8 and a heating box 6, and the two ends of the air pump 8 are respectively connected to the air inlet plate 16 and the heating box 6 through a connecting pipe 18, and an electric heating tube 8 is fixedly installed inside the heating box 6.

[0020] A feed transmission chain 25 is provided at the upper end of the machine 1 and located at the rear side of the electromagnetic heating coil device 4. A discharge transmission chain 26 is provided at the upper end of the machine 1 and located in front of the insulation device 3. An electric heating wire is provided inside the discharge transmission chain 26. Each stator 2 is transported to the rear side of the electromagnetic heating coil device 4 in turn through the feed transmission chain 25. Since the heating temperature of the electromagnetic heating coil device 4 is relatively high, the stator 2 is grasped by a mechanical claw 27 and placed inside the electromagnetic heating coil device 4 for heating.

[0021] The driving structure 9 includes a limit plate 901, a driven gear 902 and a driving gear 903. The limit plate 901 is rotatably connected to the upper end of the placement plate 5 through a rotating shaft, and the bottom end of the rotating shaft extends through the coupling to the bottom end of the placement plate 5 and is sleeved on the outer surface of the output end of the reduction motor. The driven gear 902 is fixedly connected to the outer surface of the bottom end of the rotating shaft. The driving gear 903 is rotatably connected to one side of the bottom end of the placement plate 5 through the rotating shaft, and the outer surface of the driving gear 903 is meshed with the outer surface of the driven gear 902. The bottom end of the driving gear 903 is fixedly connected to a turning handle. , below the limit plate 901, and located at the upper end of the placement plate 5, three groups of slide rails 904 are fixedly connected, the upper ends of the three groups of slide rails 904 are slidably connected to the slide 905, the splint 10 is fixedly connected to the upper end of the three groups of slides 905 on the side away from each other, and the upper end surface of the limit plate 901 is provided with three groups of limit holes 90101, and each group of limit holes 90101 is arranged in an arc-shaped inclined shape, the upper ends of the three groups of slides 905 on the side away from the splint 10 are fixedly connected to the limit rod 906, and the limit rod 906 is slidably connected to the corresponding limit hole 90101.

[0022] The heated stator 2 is then grabbed by the mechanical claw 27 and placed on the placement plate 5 inside the insulation device 3, and is sleeved on the outer surface of the limit plate 901. The handle is then rotated to drive the driving gear 903 to rotate. While the driving gear 903 rotates, it engages and drives the driven gear 902 to rotate, and through the connection of the rotating shaft between the limit plate 901 and the driven gear 902, the limit plate 901 is driven to rotate. At this time, each limit rod 906 is slidably connected to the inside of the corresponding limit hole 90101, thereby pushing the three groups of slides 905 to slide along the slide rail 904 toward the side away from each other, and driving the splint 10 to fit close to the inner wall of the stator 2, thereby fixing it inside the insulation device 3 according to the size of the stator 2.

[0023] The bottom end of the placement plate 5 is fixed with a fixing seat 11 on one side of the driving gear 903. A groove 1101 is provided on the side of the fixing seat 11 close to the driving gear 903. The interior of the groove 1101 is movably connected with a connecting rod 12 that extends through and to the outside of the fixing seat 11. The outer surface of the connecting rod 12 at one end of the groove 1101 is fixedly connected with a slide plate 13, and the slide plate 13 is slidably connected to the inside of the groove 1101. A spring 14 is fixedly connected between one side of the slide plate 13 and the inner wall of the groove 1101, and the spring 14 is wound around the outer surface of the connecting rod 12. One end of the connecting rod 12 close to the driving gear 903 is fixedly connected to a limiting block 15. One end of the limiting block 15 movably extends through and extends to the outer surface of the fixing seat 11 and engages with the outer surface of the driving gear 903.

[0024] Release the pull on the connecting rod 12, so that the spring 14 releases the elastic force, thereby pushing the limit block 15 to engage with the outer surface of the driving gear 903, thereby limiting the rotation of the driving gear 903 and preventing the movement of the driven gear 902 from affecting the fixation of the stator 2. After the stator 2 is fixedly placed inside the heat preservation device 3, the electric heating pipe 7 is started to heat the air inside the heating box 6, and the air pump 8 is used to cooperate with the connecting pipe 18 to send hot air to the air inlet plate 16, and then the hot air is evenly and comprehensively delivered to the interior of the heat preservation device 3 using each air inlet slot 1601. At the same time, the reduction motor is started to drive the placement plate 5 with the stator 2 to rotate, so that the stator 2 is evenly heated inside the heat preservation device 3, thereby reducing the temperature of the stator 2 in the electromagnetic heating coil device 4, which is convenient for subsequent processing operations. Then, the stator 2 is taken out from the interior of the heat preservation device 3 and placed on the upper end of the discharging transmission chain 26 for the next operation. The electric heating wire provided inside the discharging transmission chain 26 can keep multiple stators 2 transported simultaneously warm.

[0025] The top of the heat preservation device 3 is fixedly connected to a return box 20 on one side of the heating box 6. An activated carbon filter plate 21 is sealed and plugged into one side of the return box 20. An air outlet plate 17 is fixedly installed on the side of the heat preservation device 3 away from the air inlet plate 16. The surface of the air outlet plate 17 is provided with a plurality of through-connected air outlet slots 1701. The side of the return box 20 away from the heating box 6 is connected to the air outlet plate 17 through a connecting pipe 18. A one-way valve 19 is provided at the vent of the air outlet plate 17. A first solenoid valve 22 is connected to the side of the heating box 6 close to the return box 20, and the return box 20 is connected to the first solenoid valve 22 through the connecting pipe 18. The air passes through the air outlet slot 1701 and then flows out of the air outlet plate 17. The air is discharged from the vent 17, and the one-way valve 19 is used to prevent the air from flowing back. The air enters the reflux box 20 along the connecting pipe 18, and the activated carbon filter plate 21 is used to purify the air. The air passes through the connecting pipe 18 to the first solenoid valve 22 and enters the heating box 6, where the air is heated for the second time, thereby forming a cycle to avoid wasting resources. One end of the heating box 6 is connected to the second solenoid valve 23, and one side of the upper end of the reflux box 20 is connected to the third solenoid valve 24. After long-term use, the second solenoid valve 23 and the third solenoid valve 24 can be opened, and the first solenoid valve 21 can be closed to allow fresh air to enter the heating box 6. At the same time, the air in the reflux box 20 is discharged to achieve fresh air ventilation.

[0026] Working principle: Each stator 2 is transported to the rear side of the electromagnetic heating coil device 4 in sequence through the feeding transmission chain 25. Since the heating temperature of the electromagnetic heating coil device 4 is relatively high, the stator 2 is grabbed by the mechanical claw 27 and placed inside the electromagnetic heating coil device 4 for heating. The heated stator 2 is then grabbed by the mechanical claw 27 and placed on the placement plate 5 inside the heat preservation device 3, and is sleeved on the outer surface of the limit plate 901. Then, the connecting rod 12 is pulled to drive the slide plate 13 to squeeze the spring 14 to compress, and drive the limit block 15 to disengage from the meshing with the driving gear 903. Then, the turning handle is turned to drive the driving gear 903 to rotate. While the driving gear 903 rotates, it engages and drives the driven gear 902 to rotate. The limit plate 901 is driven to rotate by connecting the rotating shaft between the limit plate 901 and the driven gear 902. At this time, each limit rod 906 is slidably connected to the inside of the corresponding limit hole 90101, thereby pushing the three sets of slides 905 to slide along the slide rail 904 toward the side away from each other, and driving the clamping plate 10 to fit close to the inner wall of the stator 2, thereby fixing it inside the heat preservation device 3 according to the size of the stator 2, and then releasing the pull on the connecting rod 12, so that the spring 14 releases the elastic force, thereby pushing the limit block 15 to engage with the outer surface of the driving gear 903, thereby limiting the rotation of the driving gear 903, and preventing the movement of the driven gear 902 from affecting the fixation of the stator 2; After the stator 2 is fixedly placed inside the heat preservation device 3, the electric heating tube 7 is started to heat the air inside the heating box 6, and the air pump 8 is used in conjunction with the connecting pipe 18 to send the hot air to the air inlet plate 16, and then the hot air is evenly and comprehensively transported to the inside of the heat preservation device 3 by using each air inlet slot 1601, and at the same time, the reduction motor is started to drive the placement plate 5 with the stator 2 to rotate, so that the stator 2 is evenly heated inside the heat preservation device 3, thereby reducing the temperature of the stator 2 in the electromagnetic heating coil device 4, which is convenient for subsequent processing operations. Then, the stator 2 is taken out from the inside of the heat preservation device 3 and placed on the upper end of the discharging transmission chain 26 for the next operation. The electric heating wire provided inside the discharging transmission chain 26 can keep multiple stators 2 transported simultaneously warm. Then the air passes through the air outlet slot 1701 and is discharged from the vent of the air outlet plate 17, and the one-way valve 19 is used to prevent the air from flowing back. The air enters the return box 20 along the connecting pipe 18, and is purified by the activated carbon filter plate 21. The air follows the connecting pipe 18 to the first solenoid valve 22 and enters the heating box 6, where the air is heated for the second time, thus forming a cycle to avoid wasting resources. After long-term use, the second solenoid valve 23 and the third solenoid valve 24 can be opened, and the first solenoid valve 21 can be closed to allow fresh air to enter the heating box 6. At the same time, the air in the return box 20 is discharged to achieve fresh air ventilation.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A heating device for a motor stator, comprising a machine platform (1) and a stator (2), wherein a heat preservation device (3) and an electromagnetic heating coil device (4) are provided at the upper end of the machine platform (1), characterized in that: A mechanical claw (27) is provided between the heat preservation device (3) and the electromagnetic heating coil device (4) and at the upper end of the machine platform (1); the bottom end of the heat preservation device (3) is connected to a placement plate (5) through a reduction motor drive; the upper end of the placement plate (5) is connected to a clamping plate (10) through a drive structure (9); the stator (2) is provided at the upper end of the placement plate (5), and the outer wall of the clamping plate (10) is in contact with the inner wall of the stator (2); the heat preservation device An air inlet plate (16) is fixedly connected to one side of the inner wall of the heat preservation device (3); a plurality of through-connected air inlet slots (1601) are provided on the side of the air inlet plate (16) close to the inner wall of the heat preservation device (3); an air pump (8) and a heating box (6) are fixedly connected to the top of the heat preservation device (3); two ends of the air pump (8) are respectively connected to the air inlet plate (16) and the heating box (6) through connecting pipes (18); an electric heating pipe (8) is fixedly installed inside the heating box (6).

2. A heating device for a motor stator according to claim 1, characterized in that: The driving structure (9) comprises a limit plate (901), a driven gear (902) and a driving gear (903); the limit plate (901) is rotatably connected to the upper end of the placement plate (5) via a rotating shaft, and the bottom end of the rotating shaft extends through a coupling to the bottom end of the placement plate (5) and is sleeved on the outer surface of the output end of the reduction motor.

3. A heating device for a motor stator according to claim 2, characterized in that: The driven gear (902) is fixedly connected to the outer surface of the bottom end of the rotating shaft, and the driving gear (903) is rotatably connected to one side of the bottom end of the placement plate (5) via the rotating shaft, and the outer surface of the driving gear (903) is meshed with the outer surface of the driven gear (902), and the bottom end of the driving gear (903) is fixedly connected to a turning handle.

4. A heating device for a motor stator according to claim 2, characterized in that: Below the limit plate (901), three groups of slide rails (904) are fixedly connected at the upper end of the placement plate (5); the upper ends of the three groups of slide rails (904) are slidably connected to slide seats (905); and the clamping plates (10) are fixedly connected to the upper ends of the three groups of slide seats (905) on a side away from each other.

5. A heating device for a motor stator according to claim 4, characterized in that: The upper end surface of the limit plate (901) is provided with three groups of limit holes (90101), and each group of limit holes (90101) is arranged in an arc-shaped inclined shape. The upper ends of the three groups of slide seats (905) on the side away from the clamping plate (10) are fixedly connected to the limit rods (906), and the limit rods (906) are slidably connected to the inside of the corresponding limit holes (90101).

6. A heating device for a motor stator according to claim 2, characterized in that: A fixing seat (11) is fixedly provided at the bottom end of the placement plate (5) and located on one side of the driving gear (903); a groove (1101) is provided on a side of the fixing seat (11) close to the driving gear (903); a connecting rod (12) is movably connected inside the groove (1101) and extends through the fixing seat (11) to the outside.

7. A heating device for a motor stator according to claim 6, characterized in that: A slide plate (13) is fixedly connected to the outer surface of one end of the connecting rod (12) located inside the groove (1101), and the slide plate (13) is slidably connected to the inside of the groove (1101); a spring (14) is fixedly connected between one side of the slide plate (13) and the inner wall of the groove (1101), and the spring (14) is wound around the outer surface of the connecting rod (12).

8. A heating device for a motor stator according to claim 6, characterized in that: One end of the connecting rod (12) close to the driving gear (903) is fixedly connected to a limiting block (15), and one end of the limiting block (15) movably extends through the outer surface of the fixing seat (11) and meshes with the outer surface of the driving gear (903).

9. A heating device for a motor stator according to claim 1, characterized in that: A feed transmission chain (25) is provided at the upper end of the machine (1) and located at the rear side of the electromagnetic heating coil device (4); a discharge transmission chain (26) is provided at the upper end of the machine (1) and located at the front side of the heat preservation device (3); an electric heating wire is provided inside the discharge transmission chain (26); a return box (20) is fixedly connected to the top end of the heat preservation device (3) and located at one side of the heating box (6); an activated carbon filter plate (21) is sealed and plugged into one side of the return box (20); an air outlet plate (17) is fixedly installed on the side of the heat preservation device (3) away from the air inlet plate (16); a plurality of through-connected air outlet slots (1701) are provided on the surface of the air outlet plate (17); a side of the return box (20) away from the heating box (6) is connected to the air outlet plate (17) via a connecting pipe (18); and a one-way valve (19) is provided at the vent of the air outlet plate (17).

10. A heating device for a motor stator according to claim 9, characterized in that: A first solenoid valve (22) is connected to a side of the heating box (6) close to the return box (20), and the return box (20) is connected to the first solenoid valve (22) via a connecting pipe (18); a second solenoid valve (23) is connected to one end of the heating box (6); and a third solenoid valve (24) is connected to one side of the upper end of the return box (20).

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